IT WAS every 90s kid’s favourite cartoon but it was the show’s theme song that has kept it a cult classic even 30 years on.

The opening theme for DuckTales was written by Mark Mueller, a struggling songwriter from Los Angeles, who managed to think up the insanely catchy tune on a whim.

The songwriter recently sat down with Vanity Fair to remember writing the catchy tune, telling the publication how much of an impact it’s had on his life.

“When people find out what I do for a living, they’ll always ask if they’d know one of my songs,” he said.

“Sometimes they won’t know my pop hits. But almost everywhere I’ve gone, people know DuckTales. The reach of it is so mind-blowing,” he added.

The cartoon and opening theme song is still a classic even 30 years on.Source:Alamy

And despite the song’s lasting effect on the world — a YouTube search brings up more than 300,000 versions of the tune including metal and reggae covers — Mueller was paid an absolute pittance for his work with Disney.

One Disney executive Chris Montan described his paycheck of $US1,250 as “whopping”.

And his tiny paycheck would only be delivered “if Disney used the song on the show and it actually aired. Which, fortunately, it did,” he added.

Perhaps the only reassuring part of his small payment was that Mueller took less than an hour to write the demo, one that Disney executives claimed “really stood out”.

Mueller also revealed he was told by Disney they weren’t looking for a traditional “cartoon” song, rather one that would sound like it came straight off pop radio — and clearly, the vision worked.

DuckTales scored a TV movie revival this weekend and is due for a full series reboot on Disney next month.

In December, 2016, the new cast for the 2017 DuckTales series released a video covering the iconic theme song which has since been viewed more than five million times.

In his Vanity Fair interview, Mueller also took the time to clear up whether the song’s iconic line is actually spelt “woo-oo” or “woo-hoo”.

“‘Woo-hoo’ is the spelling I’ve always had in my head for it,” said Mueller, before adding, “Actually, it was more ‘a-woo-hoo’.”

But despite all the debate, the songwriter seems to be easy either way.

“‘Woo-hoo’ or ‘woo-oo’ or ‘a-woo-hoo,’ it’s just supposed to sound and feel fun. And when they’re saying it 30 years later, any way you want to spell it is fine with me,” he said.

DuckTales: The Movie -Treasure of the Lost Lamp from 1990. Picture: Walt Disney PicturesSource:Alamy